public class Main{
    public static void main(String[] args) {
        System.out.println("hello java!");

        for(int i = 0 ; i < 10 ; i++){
            System.out.println("i = "+ i);
        }

        int a = 1;
        while(a < 10){
            System.out.println("this a = " + a);
            a++;
        }
    }
}